Evaluation of Long Range Transport of Ozone in Western Mediterranean Basin

This study investigates the photochemical air pollution formed in a metropolitan area in terms of precursor pollutants. This investigation concerns an episode registered in Mediterranean region (Algerian Coast) occurred from 28th to 29th July, 2013, precursor emissions, meteorological and topography conditions were faced to the combined reliable systems of advanced atmospheric modelling (No-Hydrostatic SKYRON/CAMX). The production and transport of tropospheric ozone over the Mediterranean region is examined by applying a spatiotemporal analysis of the atmospheric circulation in order to investigate the origin sources of polluted air masses (O^sub 3^, NO^sub 2^ and NO) and their impact on the Algerian O^sub 3^. This effort of photochemical modelling, discussed here, show some results, such as the appearance of high ozone levels in the vicinity of urban areas as well as in remote locations. Ozone plumes of South and West of Europe can travel long distances over the Mediterranean Sea affecting remote locations of North Africa, precisely the Algerian coast. Incidentally, the modeled ground-level ozone during this episode is higher (0.162 ppm) than regulation value of the region is around 0.080 ppm.